loop3: detected capacity change from 0 to 4096 ================================================================== BUG: KASAN: use-after-free in nilfs_iget_test+0xa1/0x330 fs/nilfs2/inode.c:544 Read of size 8 at addr ffff88802a7efff8 by task syz-executor.3/20042 CPU: 0 PID: 20042 Comm: syz-executor.3 Not tainted 6.1.0-syzkaller-03295-g02bf43c7b7f7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x1f0 mm/kasan/report.c:395 kasan_report+0xcd/0x100 mm/kasan/report.c:495 nilfs_iget_test+0xa1/0x330 fs/nilfs2/inode.c:544 find_inode+0x1ac/0x4c0 fs/inode.c:915 ilookup5_nowait fs/inode.c:1428 [inline] ilookup5+0x9d/0x1d0 fs/inode.c:1457 iget5_locked+0x33/0x270 fs/inode.c:1238 nilfs_iget_locked+0x140/0x1d0 fs/nilfs2/inode.c:605 nilfs_dat_read+0xbd/0x300 fs/nilfs2/dat.c:490 nilfs_load_super_root fs/nilfs2/the_nilfs.c:121 [inline] load_nilfs+0x4c8/0xfa0 fs/nilfs2/the_nilfs.c:302 nilfs_fill_super+0x27e/0x5d0 fs/nilfs2/super.c:1059 nilfs_mount+0x613/0x9b0 fs/nilfs2/super.c:1315 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1489 do_new_mount+0x289/0xad0 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f74aea8d60a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f74af8d3f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000ecf RCX: 00007f74aea8d60a RDX: 0000000020000000 RSI: 0000000020000f00 RDI: 00007f74af8d3fe0 RBP: 00007f74af8d4020 R08: 00007f74af8d4020 R09: 0000000002200c00 R10: 0000000002200c00 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000f00 R14: 00007f74af8d3fe0 R15: 00000000200001c0 The buggy address belongs to the physical page: page:ffffea0000a9fbc0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2 pfn:0x2a7ef flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000002 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 18546, tgid 18546 (syz-executor.1), ts 2134109368624, free_ts 2161999760884 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4291 __alloc_pages+0x259/0x560 mm/page_alloc.c:5558 alloc_slab_page+0xbd/0x190 mm/slub.c:1851 allocate_slab+0x5e/0x3c0 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0x782/0xe20 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc_lru+0x238/0x320 mm/slub.c:3483 alloc_inode_sb include/linux/fs.h:3116 [inline] ext4_alloc_inode+0x27/0x590 fs/ext4/super.c:1321 alloc_inode fs/inode.c:259 [inline] new_inode_pseudo+0x61/0x1d0 fs/inode.c:1018 new_inode+0x25/0x1d0 fs/inode.c:1046 __ext4_new_inode+0x26d/0x46f0 fs/ext4/ialloc.c:959 ext4_symlink+0x388/0xbf0 fs/ext4/namei.c:3373 vfs_symlink+0x246/0x3d0 fs/namei.c:4401 do_symlinkat+0x1e5/0x5f0 fs/namei.c:4430 __do_sys_symlinkat fs/namei.c:4447 [inline] __se_sys_symlinkat fs/namei.c:4444 [inline] __x64_sys_symlinkat+0x95/0xa0 fs/namei.c:4444 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare+0x80c/0x8f0 mm/page_alloc.c:1509 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x7d/0x5f0 mm/page_alloc.c:3483 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x1b3/0x350 mm/slub.c:3476 mt_alloc_one lib/maple_tree.c:152 [inline] mas_alloc_nodes+0x1fd/0x650 lib/maple_tree.c:1226 mas_node_count_gfp lib/maple_tree.c:1310 [inline] mas_preallocate+0x133/0x340 lib/maple_tree.c:5717 vma_expand+0x261/0x9c0 mm/mmap.c:541 mmap_region+0xcae/0x1e20 mm/mmap.c:2588 do_mmap+0x8d9/0xf30 mm/mmap.c:1411 vm_mmap_pgoff+0x19e/0x2b0 mm/util.c:520 ksys_mmap_pgoff+0x48c/0x6d0 mm/mmap.c:1457 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88802a7efe80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88802a7eff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88802a7eff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88802a7f0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88802a7f0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================